#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
constexpr auto i = 0.08;
int main(void)
{
	int n = 0;
	float j = 1000000;
	while (j > 0)
	{
		j = j + j * i;
		j = j - 100000;
		n++;
	}
	printf("%d", n);

	return 0;
}